Casino history lives in objects: worn cards, roulette wheels with single-zero...

https://varimail.com/articles/why-reels-became-the-default-way-to-show-slot-outcomes/

Casino history lives in objects: worn cards, roulette wheels with single-zero or double-zero layouts, and slot reels made for a changing public. A Market Street workshop in 1895 links gambling, invention, and everyday craft.